不同套袋条件对石榴品质的影响

摘要

2002-2003年在会理石榴产区进行了不同纸袋、不同套袋时间和不同摘袋时间的果实套袋试验.结果表明,套白色单层袋的果实色泽最佳,条纹袋次之,黑色袋最差.不同纸袋套袋后果实与对照(不套袋)相比,单果重差异显著.其中,以套黑色袋果实最重,达427.37g.就含糖量而言,套袋均比不套袋有显著提高,其中以条纹袋最高,达12.78%,比对照(11.36%)提高了1.42%;同时,不同纸袋都显著降低了含酸量,其中以条纹袋最低(0.57%),比对照(0.63%)低0.06%.不同套袋时间对果实单果重和含糖量无显著影响,但显著降低了果实的含酸量,以6月3日套袋果实含酸量最低.摘袋时间对果实内部品质的影响未达到显著水平,但建议在采收前7天摘袋.%An experiment with different types of paper bags, encasing and uncasing times of fruit in pomegranate, which was carried out at the producing area of Huili County during 2002 to 2003, showed that the fruits in white single layer bags appeared best in color, then in striped bags, and in the black ones. Compared with CK (uncased), there was significant difference in fruit' s weight with different types of bags. Among them, fruits in black bag averagely weighed 427.37 g, the biggest ones of all. Sugar content in different bags increased greatly compared with that of CK (uncased), in which the sugar content of stripe -encased fruits reached as high as 12.78%, an increase of 1.42%. Encased fruits clearly decreased their acid contents, thereinto the stripe-encased ones reached the lowest of 0.57%, 0.06% lower than CK (0.63%). It proved that encasing time didn't affect the fruit weight and sugar content, but significantly decreased acid content, with the fruits encased on June 3 having the lowest acid content. It is suggested that uncasing time of fruit should be 7 days before harvest.